122 needs an engine

[webrx123]

Hey folks,
First the question - will a k321 drop into 122? I know it originally came with a k301 and I have a K301S in unknown conditions, and I have a good running k321.

I have a 122 when I got it there was a Tecumseh hh120 in it. Ran and plowed, but, had an iffy ignition switch, so, I got a new switch and promptly fried the SSI in the Tecumseh. I have since learned that you need an ignition switch with a ground terminal not a standard 122 ignition switch with a positive for the coil.

In any case, I don't want to spend 300 for a used SSI module, and while i may try the Ford wheel sensor and Chrysler ignition module at some point, for now, the Tecumseh is no longer in the 122.

I have a K321 from a Wheel Horse GT14 that is in good running condition so I am thinking I am going to swap this into the 122.

I also have a k301S from another Wheel Horse (package deal). The 301 is in unknown running condition and will need a 4 bolt adapter to connect the clutch/driveshaft it it does run.

Wondering if there are any major items to look out for swapping in a k321. It looks like it will fit and the drive shaft will bolt up (I have an adapter on hand I believe).

the Frame on this 122 was already cut to fit the Tecumseh (Something I may repair in the future as this is my snow plow). Its been cold and snowy out so have not yet had a chance to go measure everything, so basically looking for Yeah that will drop right in "or" won't work because of XYZ or will work but you need to be aware of these things.

Thanks in advance.

Dave

[green407]

The major difference you're looking for is the oil pan.

The Cub Cadets use the special oil pan, where Wheel Horse used the standard oil pan. Meaning the base of the blocks is not the same, and you cannot just swap the oil pans.

So I don't think either of these engine will just drop in.

Let's see if I was able to upload my image.

You can see 3 different styles of basses to these blocks.
They're all K301's. The far left is most likely what you Wheel Horse engines have.
You may get lucky and they could be like the center one, where you would need to tap the oil pan bolt holes in install the special oil pan.
The far right block is the correct one for your application.

[webrx123]

Thank you, I will take a look and see what I can figure out. I appreciate the info and images.

Dave

[webrx123]

Thanks again, did some measuring last night, and was able to fully understand the issue. from frame to center of clutch on my 122 is 4.5", from frame to center of clutch for the WH engines it is about 6". Guess I am on the lookout for a new engine, or I am going to have to do the mod for the Tecumseh to get it back on plowing duty.

Edited: was looking at the wrong numbers - fixed them

Dave

[DougM]

Hi,

Is the SSI module on the Tecumseh engine mounted above or underneath the flywheel? If it is above the flywheel, I have seen a video where someone installed a magnetron coil for a Briggs engine.

[webrx123]

It sits above the flywheel.
I picked up the parts to mod this based on Ed Stoller video. Going to give it a shot. Also in the lookout for a k301 as I can put in the 122 to get it back to original engine.